[C#]如何在winform中填充矩阵单元格中的颜色？

using System;
using System.Drawing;
using System.Windows.Forms;

namespace MatrixColorFill
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // 创建一个DataGridView控件
            DataGridView dataGridView = new DataGridView();
            dataGridView.Dock = DockStyle.Fill;
            dataGridView.CellFormatting += DataGridView_CellFormatting;

            // 设置行数和列数
            int rowCount = 5;
            int columnCount = 5;
            dataGridView.RowCount = rowCount;
            dataGridView.ColumnCount = columnCount;

            // 设置其他相关属性
            dataGridView.RowHeadersVisible = false;
            dataGridView.AllowUserToAddRows = false;
            dataGridView.AllowUserToDeleteRows = false;
            dataGridView.AllowUserToResizeColumns = false;
            dataGridView.AllowUserToResizeRows = false;
            dataGridView.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;

            // 添加到窗体中
            this.Controls.Add(dataGridView);
        }

        private void DataGridView_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            // 根据需要的逻辑，为特定的单元格设置背景色
            if (e.RowIndex >= 0 && e.ColumnIndex >= 0)
            {
                DataGridView dataGridView = (DataGridView)sender;
                DataGridViewCell cell = dataGridView.Rows[e.RowIndex].Cells[e.ColumnIndex];

                // 设置第一行第一列的单元格为红色
                if (e.RowIndex == 0 && e.ColumnIndex == 0)
                {
                    cell.Style.BackColor = Color.Red;
                }
                // 设置第二行第二列的单元格为绿色
                else if (e.RowIndex == 1 && e.ColumnIndex == 1)
                {
                    cell.Style.BackColor = Color.Green;
                }
                // 设置其他单元格为默认颜色
                else
                {
                    cell.Style.BackColor = dataGridView.DefaultCellStyle.BackColor;
                }
            }
        }
    }
}